Tenaris updates on USD1.2 billion share buyback program

Tenaris S.A. reported weekly progress on the second tranche of its USD1.2 billion share buyback program.

Rhea-AI Filing Summary

Tenaris S.A. reported weekly progress on the second tranche of its USD1.2 billion share buyback program. Between December 8 and December 12, 2025, the company repurchased 4,923,147 ordinary shares for a total consideration of €85,819,351, equivalent to USD100,077,422.

This second tranche covers up to USD600 million of open-market repurchases under the broader program. As of December 12, 2025, Tenaris held 51,262,421 ordinary shares in treasury, equal to 4.78% of its total issued share capital, and it intends to cancel shares purchased under the programs in due course.

FAQ

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What did Tenaris (TNRSF) report in this 6-K filing?

Tenaris reported a weekly update on the second tranche of its USD1.2 billion share buyback program, detailing ordinary shares repurchased in the period from December 8 to December 12, 2025.

How many Tenaris (TNRSF) shares were repurchased between December 8 and 12, 2025?

From December 8 to December 12, 2025, Tenaris repurchased 4,923,147 ordinary shares for a total consideration of €85,819,351, equivalent to USD100,077,422.

What is the size of Tenaris's current share buyback program?

Tenaris is carrying out a USD1.2 billion Share Buyback Program. The second tranche referenced here covers up to USD600 million to be executed in the open market.

How many Tenaris (TNRSF) shares are held in treasury after these repurchases?

As of December 12, 2025, Tenaris held 51,262,421 ordinary shares in treasury, representing 4.78% of its total issued share capital.

What does Tenaris plan to do with the repurchased shares?

Tenaris states that it intends to cancel treasury shares purchased under the share buyback programs in due course.

Where can investors find detailed data on Tenaris's share buybacks?

Details of the transactions are available on Tenaris’s corporate website, under the Share Buyback Program section at https://ir.tenaris.com/share-buyback-program.

What does Tenaris do as a business?

Tenaris describes itself as a leading global supplier of steel tubes and related services for the world’s energy industry and certain other industrial applications.

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Accepted by SEC EDGAR 12/12/2025 - 07:00 PM Learn about SEC filing dates

FORM 6 - K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a - 16 or 15d - 16 of

the Securities Exchange Act of 1934

As of December 12, 2025

TENARIS, S.A.

(Translation of Registrant's name into English)

26, Boulevard Royal, 4th floor

L-2449 Luxembourg

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or 40-F.

Form 20-F   ✓   Form 40-F       

The attached material is being furnished to the Securities and Exchange Commission pursuant to Rule 13a-16 and Form 6-K under the Securities Exchange Act of 1934, as amended. This report contains Tenaris’s Weekly Report (December 8, 2025 – December 12, 2025) on the Second Tranche of Tenaris Share Buyback Program.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: December 12, 2025

Tenaris, S.A.

By: /s/ Giovanni Sardagna

Giovanni Sardagna

Investor Relations Officer

Giovanni Sardagna

Tenaris

1-888-300-5432

www.tenaris.com

Weekly Report (December 8, 2025 – December 12, 2025) on the Second Tranche of Tenaris Share Buyback Program.

Luxembourg, December 12, 2025. - Tenaris S.A. (NYSE and Mexico: TS and EXM Italy: TEN) (“Tenaris”) announced today that pursuant to its Second Tranche of the USD1.2 billion Share Buyback Program announced on November 2, 2025, covering up to USD600 million to be executed in the open market, it has repurchased the following ordinary shares from December 8, 2025 to (and including) December 12, 2025:

From December 8, 2025 to (and including) December 12, 2025, the Company has purchased a total of 4,923,147 ordinary shares for a total consideration of €85,819,351 equivalent to USD100,077,422.

As of December 12, 2025, the Company held in treasury 51,262,421 ordinary shares equal to 4.78% of the total issued share capital.

 

Tenaris intends to cancel treasury shares purchased under the Programs in due course.

Details of the above transactions, are available on Tenaris’s corporate website under the Share Buyback Program Section https://ir.tenaris.com/share-buyback-program.

Some of the statements contained in this press release are “forward-looking statements”. Forward-looking statements are based on management’s current views and assumptions and involve known and unknown risks that could cause actual results, performance or events to differ materially from those expressed or implied by those statements. These risks include but are not limited to risks arising from uncertainties as to future oil and gas prices and their impact on investment programs by oil and gas companies.

Tenaris is a leading global supplier of steel tubes and related services for the world’s energy industry and certain other industrial applications.